BEADM(1) General Commands Manual BEADM(1) NAME beadm -- Utility to manage Boot Environments with ZFS SYNOPSIS beadm activate <beName> beadm create [-e nonActiveBe | -e beName@snapshot] <beName> beadm create <beName@snapshot> beadm destroy [-F] <beName | beName@snapshot> beadm list [-a] [-D] [-H] [-s] beadm mount <beName> [mountpoint] beadm rename <origBeName> <newBeName> beadm { umount | unmount } [-f] <beName> beadm version DESCRIPTION The beadm command is used to setup and interact with Boot Environments with ZFS. Boot Environments allows the system to be upgraded, while preserving the old system environment in a separate ZFS dataset. COMMANDS The following commands are supported by beadm: activate <beName> Activate the given beName for the next boot. create [-e nonActiveBe | -e beName@snapshot] <beName> Creates a new boot environment named beName. If the -e param is specified, the new environment will be cloned from the given nonActiveBe | beName@snapshot. create <beName@snapshot> Creates a snapshot of the existing boot environment named beName. destroy [-F] <beName | beName@snapshot> Destroys the given beName boot environment or beName@snapshot snap- shot. Specifying -F will automatically unmount without confirma- tion. list [-a] [-D] [-H] [-s] Displays all boot environments. The Active field indicates whether the boot environment is active now (N); active on reboot (R); or both (NR). If -a is used, display all datasets. If -D is used, display the full space usage for each boot environment, assuming all other boot environments were destroyed. The -H option is used for scripting. It does not print headers and separate fields by a single tab instead of arbitrary white space. If -s is used, dis- play all snapshots as well. mount <beName> [mountpoint] Temporarily mount the boot environment. Mount at the specified mountpoint if provided. rename <origBeName> <newBeName> Renames the given nonactive origBeName to the given newBeName umount [-f] <beName> Unmount the given boot environment, if it is mounted. Specifying -f will force the unmount if busy. version List the beadm version and exit. EXAMPLES * Perform a system upgrade in a jail(8) Create a new boot environment called jailed: beadm create -e default jailed Set mountpoint for new jail to /usr/jails/jailed: beadm mount jailed /usr/jails/jailed The currently active boot environment is now replicated into the jailed system and ready for upgrade. Startup the jail, login and perform the normal upgrade process. Once this is done, stop the jail and disable it in /etc/rc.conf. Now activate the boot environment for the next boot beadm activate jailed Reboot into the new environment reboot HOWTO A HOWTO guide is posted at the FreeBSD forums: * http://forums.freebsd.org/showthread.php?t=31662 SEE ALSO jail(8), zfs(8), zpool(8) HISTORY beadm(1M) originally appeared in Solaris. AUTHORS * Slawomir Wojciech Wojtczak (vermaden) vermaden@interia.pl Creator and maintainer of beadm. * Bryan Drewery (bdrewery) bryan@shatow.net Wrote this manual page and contributed child dataset fixes. * Mike Clarke (rawthey) jmc-fbsd@milibyte.co.uk Wrote fast implementation of beadm list. Contributed a lot of fixes and usability changes. FreeBSD September 4, 2012 BEADM(1)
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